Polystyrene-diazonium-salt-based hydrophilic modification method for polyurethane

A polystyrene and hydrophilic modification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of cumbersome steps and many reagents, and achieve high reactivity , simple steps, high adsorption efficiency

Active Publication Date: 2018-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The patent "A Preparation Method of Hydrophilic Polymer-Modified Polyurethane Foam Carrier" (Application No. 201210306198.7) introduces a method for hydrophilic modification of polyurethane surface, immersing polyurethane foam in starch aqueous solution, carboxymethyl cellulose Sodium aqueous solution and N,N-dimethylformamide solution of polysuccinimide are transferred to the crosslinking agent aqueous solution and heated to obtain hydrophilic modified polyurethane foam. This method uses more reagents and needs to be vacuumed , the steps are cumbersome

Method used

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  • Polystyrene-diazonium-salt-based hydrophilic modification method for polyurethane
  • Polystyrene-diazonium-salt-based hydrophilic modification method for polyurethane
  • Polystyrene-diazonium-salt-based hydrophilic modification method for polyurethane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step 1: Take the synthesized polystyrene diazonium salt solution, and soak the polyurethane carrier with a side length of 10mm in the diluted solution for 0.5h at 2°C;

[0050] Step 2: After soaking, take out the polyurethane carrier, wash it with water, blow it with cold wind for 1 minute, then immerse the polyurethane carrier in the solution of sodium polystyrene sulfonate, absorb and soak for 2 hours at 2°C, take it out and dry it, and it is completed Hydrophilic modification of polyurethane supports.

[0051] The contact angle of the polyurethane film after hydrophilic modification was measured, the contact angle of the bulk film was 92°, the contact angle of the modified polyurethane surface was 50°, and the effect of hydrophilic modification was obvious.

[0052] The polyurethane carrier modified by hyperbranched diazonium salt and polystyrene diazonium salt under the same conditions was placed in an acidic aqueous solution with a pH of 1, and the polyurethane car...

Embodiment 2

[0054] Step 1: Take the synthesized polystyrene diazonium salt solution, and soak the polyurethane carrier with a side length of 15mm in the diluted solution for 3 hours at 4°C;

[0055] Step 2: After soaking, take out the polyurethane carrier, wash it with water, blow it with cold wind for 5 minutes, then immerse the polyurethane carrier in the solution of sodium polyacrylate, absorb and soak for 10 hours at 4°C, take it out and dry it, and complete the polyurethane carrier. Hydrophilic modification.

[0056] The contact angle of the polyurethane film after hydrophilic modification was measured. The contact angle of the bulk film was 92°, and the contact angle of the modified polyurethane surface was 53°. The effect of hydrophilic modification was obvious.

Embodiment 3

[0058] Step 1: Take the synthesized polystyrene diazonium salt solution, and soak the polyurethane carrier with a side length of 20mm in the diluted solution for 1 hour at 3°C;

[0059] Step 2: After soaking, take out the polyurethane carrier, wash it with water, blow it with cold wind for 2 minutes, then immerse the polyurethane carrier in the solution of sodium polymethacrylate, absorb and soak for 6 hours at 3°C, take it out and dry it, and the polyurethane is completed Hydrophilic modification of the carrier.

[0060] The contact angle of the polyurethane film after hydrophilic modification was measured. The contact angle of the bulk film was 92°, and the contact angle of the modified polyurethane surface was 48°. The effect of hydrophilic modification was obvious.

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Abstract

The invention relates to a polystyrene-diazonium-salt-based hydrophilic modification method for polyurethane. The polystyrene-diazonium-salt-based hydrophilic modification method comprises: 1, metering an appropriate amount of a polystyrene diazonium salt solution, and soaking a polyurethane carrier in the polystyrene diazonium salt solution for a certain time at a certain temperature; and 2, taking out the polyurethane carrier after completing the soaking, washing with water, blowing for a certain time with cold air, soaking the polyurethane carrier in an anionic polyelectrolyte solution, carrying out adsorption soaking for a certain time at a certain temperature, taking out, and carrying out blow drying so as to complete the hydrophilic modification process of the polyurethane carrier. According to the present invention, the anionic polyelectrolyte is immobilized on the surface of the polyurethane by using the multifunctional group property and the high reactivity of the polystyrenediazonium salt so as to achieve the hydrophilic modification of the polyurethane; and the method has simple operation and is suitable for industrialization.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for hydrophilic modification of the surface of a polyurethane carrier based on polystyrene diazonium salt. Background technique [0002] The chemical industry is a traditional pillar industry in my country. The chemical raw materials and products produced are widely used in various fields and make great contributions to the national economy. The chemical industry is a highly polluting industry. The sewage produced contains high concentrations of organic pollutants. The commonly used biochemical and physical chemical treatment methods are not effective for many chemical wastewater treatment, and it is difficult to achieve discharge standards. [0003] In the biochemical treatment of chemical sewage, adding fillers to immobilize microorganisms can significantly increase the removal rate of pollutants, improve the impact resistance of biochemical treatment, and reduce the ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C02F3/34C02F3/10C02F3/00C08L75/04
CPCC02F3/00C02F3/108C02F3/34C08J9/42C08J2375/04Y02W10/10
Inventor 李昕阳魏令勇邱松杨芳芳
Owner CHINA PETROLEUM & CHEM CORP
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